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Re: [Xen-devel] [xen-4.0-testing test] 7147: regressions - FAIL

To: Keir Fraser <keir@xxxxxxx>
Subject: Re: [Xen-devel] [xen-4.0-testing test] 7147: regressions - FAIL
From: Ian Jackson <Ian.Jackson@xxxxxxxxxxxxx>
Date: Mon, 23 May 2011 16:40:58 +0100
Cc: Ian Campbell <Ian.Campbell@xxxxxxxxxxxxx>, Olaf Hering <olaf@xxxxxxxxx>, "xen-devel@xxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxx>
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Keir Fraser writes ("Re: [Xen-devel] [xen-4.0-testing test] 7147: regressions - 
> Here's a nice short one that seems to work for me. It does rely on the
> compiler emitting the word 'unrecognized' iff the option under test is
> unrecognised. I strongly suspect this is a safe bet.

Sadly, some mad people run with LC_MESSAGES set to something other
than C which produces native-language error messages even from gcc.

> Unfortunately I can't
> see any way around grepping the output, since otherwise we can't distinguish
> the integer-assignment-to-pointer warning from the unrecognised-option
> warning.

We don't need to distinguish them.  We just need to know whether
passing the option works or not.  That's what my patch does.


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